diff options
| author | Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> | 2019-10-22 18:54:44 -0500 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2019-10-24 17:22:01 +0530 |
| commit | 49ea07d33d9a32c17e18b322e789507280ceb2a3 (patch) | |
| tree | 08ab30ff2bf4201f6a81e0454507a57493593a66 /drivers/soundwire/cadence_master.h | |
| parent | 3fc40449a06bc4510fd4eee4590af87917c47184 (diff) | |
| download | linux-49ea07d33d9a32c17e18b322e789507280ceb2a3.tar.gz | |
soundwire: intel/cadence: fix startup sequence
Multiple changes squashed in single patch to avoid tick-tock effect
and avoid breaking compilation/bisect
1. Per the hardware documentation, all changes to MCP_CONFIG,
MCP_CONTROL, MCP_CMDCTRL and MCP_PHYCTRL need to be validated with a
self-clearing write to MCP_CONFIG_UPDATE. Add a helper and do the
update when the CONFIG is changed.
2. Move interrupt enable after interrupt handler registration
3. Add a new helper to start the hardware bus reset with maximum duration
to make sure the Slave(s) correctly detect the reset pattern and to
ensure electrical conflicts can be resolved.
4. flush command FIFOs
Better error handling will be provided after interrupt disable is
provided in follow-up patches.
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20191022235448.17586-2-pierre-louis.bossart@linux.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers/soundwire/cadence_master.h')
| -rw-r--r-- | drivers/soundwire/cadence_master.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/soundwire/cadence_master.h b/drivers/soundwire/cadence_master.h index fbabd8afd3f5..6199e71edeab 100644 --- a/drivers/soundwire/cadence_master.h +++ b/drivers/soundwire/cadence_master.h @@ -141,6 +141,7 @@ irqreturn_t sdw_cdns_thread(int irq, void *dev_id); int sdw_cdns_init(struct sdw_cdns *cdns); int sdw_cdns_pdi_init(struct sdw_cdns *cdns, struct sdw_cdns_stream_config config); +int sdw_cdns_exit_reset(struct sdw_cdns *cdns); int sdw_cdns_enable_interrupt(struct sdw_cdns *cdns); #ifdef CONFIG_DEBUG_FS |